I was surprise when I first opened the packages for this DM screen, it's not just cardstock, it's the back of your players handbook cardstock. They said it would stop a dice being thrown and they were right!
The second benefit of it is all of the tables inside, and while I probably don't need the xp listings in the middle of a game, I do like how they have all of the status effects and standards DC checks all listed in a very easy to follow and find format. And while some people prefer the new DCs the errata has release (which did not make it onto this dm screen), personally I prefer the more difficult checks that were originally published (and are on my screen!).
Lastly the landscape format of the four panel wide screen is amazing, it makes it feel that your still apart of the table without cutting you off from your players. You can still see most of the dice rolls, and the action on the dungeon tiles (if you use them) without having to stand up every time something happens.
Overall, and by FAR, the BEST DM screen I have ever purchased, and for $9 it's a total steal!
That DM guy...